West Branch Reservoir
Putnam County, New York764 acresView mapDirections
No nutrient or algae sampling on record from NY DEC for this lake.
- Impaired · Mercury
- 52 ft max depth
West Branch Reservoir in Putnam County, New York has water-quality measurements published by NY DEC, shown here as reported. Maximum depth: 52 ft. Surface area: 764 acres.
West Branch Reservoir is a 764-acre lake in Putnam County, New York with a maximum depth of 52 feet (29-foot average).
Source: EPA Water Quality Portal sampling records, NYSDEC. Methodology: how these readings are compared.
What West Branch Reservoir is good for
From access and monitoring records, not editorial picks.
- Deep water52 ft surveyed max depth
Swimming conditions
No readingRecreation use not supported
Nutrient and algae readings are not a swimming clearance. West Branch Reservoir is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury, nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Whether West Branch Reservoir is safe to swim in today is a call for the New York Department of Environmental Conservation and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for West Branch Reservoir
These are the measurements NY DEC publishes for West Branch Reservoir, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. TSI undefined.
Ask about West Branch Reservoir
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
52 ft
Average depth
29 ft
Surface area
764 acres
Shoreline
10.3 mi
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Fishing West Branch Reservoir
EPA Impairment Status
West Branch Reservoir is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 4A).
Causes of impairment
Designated uses not supporting: Aquatic life, Recreation.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit NY1302-0022 · Official waterbody report
Nearby Lakes in Putnam County
Frequently asked questions about West Branch Reservoir
Where is West Branch Reservoir?
- West Branch Reservoir is a lake in Putnam County, New York. Its water-quality measurements are published by NY DEC and shown on this page as reported.
What is the water quality of West Branch Reservoir?
- West Branch Reservoir in Putnam County, New York has water-quality measurements published by NY DEC, shown here as reported. Maximum depth: 52 ft. Surface area: 764 acres.
Is West Branch Reservoir safe to swim in?
- Nutrient and algae readings are not a swimming clearance. West Branch Reservoir is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury, nutrients (phosphorus, nitrogen). Check local advisories before you swim.
How deep is West Branch Reservoir?
- West Branch Reservoir has a maximum depth of 52 feet and an average depth of 29 feet. The lake covers 764 acres.
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Where this data comes from
Measurements for West Branch Reservoir come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database